Stopping means for looms



Sept. 4, 1945. c 1 BROWN 2,383,931

STOPPING MEANS FOR LOOMS Filed Oct. 28, 1944 2 Sheets-Sheet l l/E/V727E.

CARL 0 BRUW/v 5r r ATTURA/EY.

Sept. 4, 1945. c. D. BROWN STOPPING MEANS FOR LOOMS Filed 001;. 28, 19442 Sheets-Sheet 2 EARL 7 BRUWA/ A 7 TUNA/EX Patented Sept. 4, 1945STOPPING MEANS For: LOOMS Carl D. Brown, Hopedale, Masa, assignor toDraper Corporation, Hoped'ale, Mass., a corporation of Maine ApplicationOctober 28, 1944, Serial No. 560,805

\ 4 Claims. (01. 139 377 )2 The present invention relates generally tostop motions for automatic filling replenishing looms and, asillustrated herein, relates more particularly to stop motions for suchlooms which are conditioned for operation to stop the loom through theusual warp stop motion upon filling failure.

It is usual practice to provide means for stopping the loom when thereis a filling failure due, for example, to filling breakage. Detection ofsuch failure takes place in many instances at the fillin'g replenishingside of the loom and stopping of the loom is usually accomplishedthrough a filling fork feeler mechanism which operates throughconnections to the other side ofthe loom to move the shipper handle outof holding position and into stopping position to disengage the clutchand thus stop the loom.-Such connections, however, are objectionablebecause of the number of parts and the consequent lost motion.

One object of the present invention is to provide stopping means for aloom by the use of which the filling fork slide will operatesubstantially directly to condition the parts to stop the loom. To

this end and in accordance with one feature of the invention, thefilling fork slide is provided with means for moving a stopping memberinto stopping position. As illustrated, the filling fork slide isprovided with a cam surface arranged to bear against a spring pressedplunger on one end of a Bowden wire having its other end arranged belowa knock-off finger of the usual mechanical warp stop motion and whichwill move said knock-off finger into position when the filling forkslide is moved upon the occurrence of filling failure. Thus, a simpleand effective means is provided for stopping the loom within a minimumnumber of mechanical connections.

With the above and other objects and features in view, the inventionwill now be described with particular reference to the accompanyingdrawings in which:

Fig. 1 is a perspective View of the right hand side of a loom in whichthe present invention is embodieo;

Fig. 2 is a similar view of the left hand side of the loom showing theknock-01f mechanism; and

Fig. 3 is a detail view, partly in section, of the knock-off mechanism.

The entire loom is not shown in the drawings since the parts not shownare of usual construction. The construction and operation of the warpstop motion to which the present invention is applied is clearlydescribed and claimed in United States Letters Patent No. 1,538,625issued May 19, 192 5, in the names of H. A. Davis and Arthur S. Johnsonto which reference may be had for a description of those parts thereofwhich are not shown or described herein.

The drawings show a filling fork ill of usual construction which isarranged to be engaged by the filling to prevent operative connectionbetween the fork and the usual filling feeler slide [2, therebypreventing forward movement of the filling slide and actuation ofconnections to the usual shipper handle of the loom.

The filling fork l is pivotally supported in the rear end portion of thefilling feeler slide I2. The fork I0 is arranged to be tilted byengagement with the filling after the shuttle is picked into the righthand shuttle box 14 on the lay and thus raise the wire loop I6 so thatit will not engage a hook l8 pivoted to the upper end portion of afilling motion lever 20. The filling motion lever is pivoted at 22 tothe 100m frame and at its rear end engages or rests on a cam member 24.Th filling motion lever 20 and the cam member 24 are of usualconstruction and operate to re ciprocate the hook I8 during alternatepicks of the shuttle or, in other words, when the shuttle is in theright hand shuttle box l4. If the filling is broken, the tines of thefilling fork III will meet no resistance as the tines pass between thebars of the grate 26 on the forwardly moving lay. As a result, the loopIE will engage the hook I8 and, when the filling motion lever 20 isrocked by the cam member 24, the filling feeler slide I2 will be movedforwardly to operate the loom stopping mechanism.

The forward end of the filling feeler slide I2 is provided with aninclined surface 28 which is arranged to engage and move a plunger 30secured to one end of a Bowden wire fixed to the breast beam 32 of theloom by a supporting clip 34. The wire is enclosed in a flexible conduit35 and extends along the breast beam 32 to the left hand side of theloom where it is secured to the side frame 38 by a tubular member 40.The wire enclosed in the flexible conduit 36 then extends rearwardly toknock-off mechanism 42.

The knock-off mechanism is substantially the same as that disclosed inthe above-mentioned patent to Davis et a1., and includes a bracket 44fixed in any suitable manner to the left hand side frame 38 of the loom.The bracket 44 is provided with an upwardly extending portion 46 havingan opening therein for receiving a bushing 48 in which a plunger 50 isarranged to reciprocate. The plunger 50 is hollow and is arranged toreceive the Bowden wire in the conduit 36 from asaaosimechanicalwarpstopmechanismattherearoi the loom. The bracket II isprovided with an upwardly extending proiection it which enters theslotformed in the knock rod end It and-servestoguidethetodendl6andtherodllas it is oscillated during knock onand in starting the loom.

The knock off rod end This pivotally mounted in the slot therein a knockoff 60 pivotedin the rear end portion of rod end 56 and normally" urgeddownwardl by a compression spring 82.

The forward end of the knock-off rod 58 is pro vided with a coupling 66having a slot for receiving a pin, or stud 68. fixed to the shipperhandle ll. Thus, rearward movement of the knock-off rod 58 will causetheshipper handle II to be moved from its forward running position to itsrear "stop" position. During this rearward movement of.the shipperhandle III, the

usual clutch mechanism of the loom will be released and the usual brakemechanism energized to stop the loom.

The construction and operation of the various elements has beendescribed in detail, but it may be well for a clearer understanding ofthe invention to review briefly the operation of the device. when theshuttle has been picked out of the left hand box and has been properlyboxed in the right hand shuttle box II, the lay will continue itsforward movement and the tines of the filling fork III will engage thefilling between the shuttle and the selvage of the cloth being woven.The fork ill will tilt and thus the loop it will not engage the hook it.On the other hand, if there has been filling failure, the tines of thefork Ill will pass between the bars of the grate 26 and when the fillingfeeler lever is rocked clockwise by'the cam 24, the hook it will engagethe loop It and pull the filling feeler slide l2 forwardly. The camsurface on the forward end of the slide will force the plunger 30 towardthe left, as viewed in Fig. 1. knock-oil it into the path of movement ofthe hunter 4 and the loom will be stopped as described above. It isevident that the above construction operates eflectively and withoutappreciablelost motion to stop the loom.

of said slide.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United'states is:

1. In a loom, means operated upon warp failure to stop the loom, afilling fork arranged to be tilted upon engagement with the filling, aslide on which the fork is pivoted, aloop on said fork, means having aprojection thereon arranged to be engaged by said loop upon'fillingfailure and for reciprocating said slide, a cam surface on said slide,and means interposed between said cam surface and said stopping meansand arranged to actuate said stopping means during movement 2. In aloom, an oscillating lay, warp stop mechanism including a member fixedto the lay and means movable into the path of movement of said memberupon warp failure for stopping the The plunger 30 will raise the loom, afilling feeler fork arranged to engage filling upon forward movement ofthe lay and to be tilted thereby, a slide having a cam surface thereon,means for reciprocating said slide upon failure of the fork to tiltbecause of filling failure, and a connection between the slide and saidwarp stop mechanism arranged to be moved into stopping position duringforward movement of the slide.

3. Ina loom, an oscillating lay, means operated upon warp failure tostop the loom, a filling fork arranged to be tilted upon engagement withthe filling during forward movement of said lay, a slide on which thefork is pivoted, a, loop on said fork, means having a projection thereonarranged to be engaged by said loop upon filling failure andreciprocating said slide, a cam surface on said slide, a spring-urgedplunger arranged to be engaged by said cam surface when the slide movesforwardly, and a connection between said plunger and said stopping meansto actuate said plunger and said stopping means to actuate said stoppingmeans during forward movement of said slide.

4. In a loom, a reciprocating lay, means operated upon warp failure tostop the loom, a filling feeler fork arranged to be tilted uponengagement .with the filling, a slide on which the fork is pivoted, camoperated means for reciprocating the slide upon filling failure, a loopon said fork arranged to engage said reciprocating means upon fillingfailure, a cam surface on said slide, a plunger engaging said camsurface and being arranged to be moved when the slide moves forwardly, awire member connected to said plunger and being arranged to transmitmovement of said plunger to said loom stopping means to condition saidmeans for stopping the loom.

' CARL D. BROWN.

